Question

Explain two physiological effects of auxia.

Answer 1

(1) Apical dominance and dormancy: Presence of auxin at the tip of plant stimulates the growth of the apical bud but suppresses the growth of lateral buds, this phenomenon is called apical dominance. If the apical buds are removed and auxin is supplied to the decapitated shoot the lateral buds are suppressed and thus, it confirms that auxin is responsible for apical dominance.

(2) Cell Division and cell enlargement: Auxins stimulate cell division, cell enlargement and cell elongation in the apical region.